Andrea,
I'm not a real expert, but what I've understood: \strut is an invisible
character with no width but the maximum lineheight (cont-eni, p. 72).
TeX discards glue such as \vfill or \hfill at the beginning of
horizontal or vertical boxes, so you have to fool it into believing
there is something before your \vfill. You could have an empty \vbox,
but \strut is the fastest and easiest way of achieving this.
HTH
Thomas
On Mon, 2006-06-19 at 17:55 +0200, andrea valle wrote:
> Thanks Thomas,
> it works nice.
> I still have not understood: what does \strut mean?
>> Best
> -a-